Example4B-Countdown_Interrupt

[ionel-dragomirescu]

I have tried to use the example Example4B-Countdown_Interrupt and change the statement:
rtc.setCountdownTimerFrequency(COUNTDOWN_TIMER_FREQUENCY_64_HZ);
rtc.setCountdownTimerClockTicks(224);

with:

rtc.setCountdownTimerFrequency(COUNTDOWN_TIMER_FREQUENCY_1_HZ);
rtc.setCountdownTimerClockTicks(5);

The interrupt is not generated.

The following constant: COUNTDOWN_TIMER_FREQUENCY_1/60_HZ does not work either.

Is this a known issue?

Thank you,

[AndyEngland521]

This is not a known issue, I'll investigate a bit further. have you tried using either of the corresponding get functions to attempt to retrieve the values in those registers?

[ionel-dragomirescu]

Yes I retrieve values from registers and values are set correct.

[ionel-dragomirescu]

I read the RV8803 specs and have a look to the library and find the following statement which work:

rtc.disableAllInterrupts();
rtc.setCountdownTimerEnable(DISABLE); // TE = 0
rtc.disableHardwareInterrupt(TIMER_INTERRUPT); // TIE = 1
rtc.clearInterruptFlag(FLAG_TIMER); // TF = 0
rtc.setCountdownTimerFrequency(COUNTDOWN_TIMER_FREQUENCY_1_60_HZ); // TD = b11 (3)
rtc.setCountdownTimerClockTicks(2); // TIMER COUNTER 0/1
rtc.enableHardwareInterrupt(TIMER_INTERRUPT); // TIE = 1
rtc.setCountdownTimerEnable(ENABLE); // TE = 1

Also I change the name of the constant, from COUNTDOWN_TIMER_FREQUENCY_1/60_HZ to COUNTDOWN_TIMER_FREQUENCY_1_60_HZ.

I think we can close the issue.
It's ok?

[AndyEngland521]

Sounds good, thank you!

[glyndavidson]

@ionel-dragomirescu
How did you get the interrupt to work, I can't seem to get it working.
Did you use something like "attachInterrupt(interuptPin, interruptHandler, CHANGE);" to handle the interrupt?

[ionel-dragomirescu]

Yes, I use attachInterrupt function.
attachInterrupt(digitalPinToInterrupt(INT_PIN), interruptCount, RISING);